Pipe wrench



Feb. 5, 192 4.

J. .F. DELANEY PIPE WRENCH Filed Feb. '7, 1923 gafT/i/ Patented Feb. 5, 1924.

1.4asea PATENT QFIE.

JOHN F. DELANEY, OF BOSTON, MASSACHUSETTS.

m wnnncn.

epe tim al E arr E Improvements in Pipe renches, of which the following 7 is a specification.

This invention relates to an improved wrench particularlyadapted for use in connection with cylindrical objects such as pipes, rods and thelike,"and is ofthe general type well known as Stillson'wrench The object of the invention is to provide a wrench of the character set forth which, while being strong and possessing all the mechanical advantages of a Stillson wrench,

is cheaper to manufacture. To this end the yoke which connects-the auxiliary shank to the main jaw shank is made in two parts. Preferably, and ashereinafter set forth, the two parts ofthe yoke are made duplicates of each other and are attached to the main shank by a single pin, bolt or stud, but are reversely disposedupon oppesite sides respectively 'of the main shank and their free ends engage oppositefaces of the auxiliary shank at opposite ends of the nut whereby the auxiliary shank is moved relatively to the main shank of the wrenchto" increase or diminish the'space between the jaws The invention consists particularly in the two part yoke whereby the auxiliary aw is positioned uponthe main jaw.

To these ends theinv'eiition consists in the combination and arrangement of parts set forth in the followingspecification and particularly pointed out in the claims? there 0 p Referring tothe drawings:

Figure 1 is a frontfelevation of my improved wrench, '2

Fig. 2 is a side elevation of the same as viewed from the left of Fig. 1, the handle being broken away,

Fig. 3 is a sectional elevationtaken on the line 33 of Fig. 1, andviewed'froin the right of Fig. 1,-

Fig. 4 is a front'elevation of one of the yoke arms,

1i ig. 5 is an underneath plan of the same, an

Fig. 6 is a side elevation viewed from the right of Fig. 4.

Like numerals refer to like parts throughout the several views of the drawings.

In the drawings, 10 is the main shank,

7, legs Serial No. 617,477.

the end being provided with the usual jaw 11 and having a handle 12 forming part thereof. 13 is an auxiliary shank terminating in another jaw 14. The auxiliary shank 13 is screw-threaded at 15 and has screwthreaded engagement with a nut 16. All of these parts are substantially the same as the Stillson wrench of commerce. The yoke consists of two arms 17 ,an'd18 duplicates of each other, which are connected to tlie'main shanklO by a pin 19. The arms 17 and 18 are reversely disposed so that the free end of the arm 17 engages the upper edge f the nut 16 while the free end of the arm 18 engages the lower edge of said nut. Each of the arms 17 and 18 terminates at its outer end in a semi-cylindrical portion 20, and each of said arms has a fiat inner face 21. A segmental sleeve 22 is provided upon each of said arms which extends downwardly from the portion 20 of the arm 17 and upwardly from the portion 20 of the arm 18, projecting through tlie'nut 16, and engaging opposite faces thereof. Each of, the

mental flanges 22 of the I arms 17 and 18 through the nut 16 in opposite directions respectively. The said arms are then fasten'ed to opposite faces of the main shank 10 by means ofa pin 19 which is secured thereto by riveting. The auxiliaryshank is then inserted in the nut-between the flat adjacent faces 21 of the arms 17fand 18 until the lower end thereof is engaged by the nut 16, whereupon by rotating the nut in the proper direction. the auxiliary flange and its jaw will be brought downwardly adjacent tothe main shank lO until the parts assume the relative positions illustrated in Figure l.

It will be seen that the two arms 17 and 18, duplicates of each other, and of the construction hereinbefore described and illustrated in the drawings, are very much cheaper to manufacture than the yoke of the Stillson wrench of commerce, which be ing made of one piece has to be made of malleable iron, or of some casting and cored and machined taking several processes to produce the same, and constituting a very expensive article. By making the arms separate, they can be made of forged steel, that is, of the same material as the jaws of the wrench and can be hardened and tempered.

If desired, these arms could of course be moulded in large quantities without the use, however, of any cores and with less difficulty. labor and expense. The only machine work, of course, necessary in the arms of the present invention is that upon the flat face 21 and the drilling of the pin hole.

It will be seen that the two arms, when assembled with the main and the auxiliary shanks hold the nut in place and prevent the same from slipping up or down. In other words, it fulfills all the functions performed by the yoke of the Stillson wrench of commerce and can be produced in much larger quantities and less time, hence can be manufactured at a much smaller cost.

While the construction hereinbefore set -forth and the drawings illustrate the two arms 17 and 18 as being secured to the main shank 10 by a single pin 19, it evident that these aws may be secured to the shank 10 in any suitable manner, such as by two rivets instead of one, withoutdeparting from the spirit of my invention.

I claim:

1. A wrench having, in combination, a main hank with a jaw thereon, an auxiliary shank with a jaw thereon, a nut having screw-threaded engagement with said auxiliary jaw, a yoke comprising two independent separable arms and means securing said arms to the main shank, the free ends of each of said arms engaging opposite ends of said nut.

2. A wrench having, in combination, a main shank with a jaw thereon, an auxiliary shank with a jaw thereon, a nut having screw-threaded engagement with said auxiliary jaw, a yoke comprising two independent arms and means securing said arms to the main shank, the free ends of said arms engaging opposite ends of said nut and opposite faces respectively of said auxiliary shank.

3. A wrench having, in combination, a main shank with a aw thereon, an auxiliary shank with a jaw thereon, a nut having screw-threaded engagement with said auxiliary jaw, a yoke comprising two independent arms, means securing said arms to the main shank and a segmental sleeve on the free end of each of said arm projecting through said nut and engaging opposite faces respectively of said auxiliary shank.

41. A wrench having, in combination, a main shank with a jaw thereon, an auxiliary shank with a jaw thereon, a nut having screw-threaded engagement with said auxiliary jaw, a yoke comprising two independent arms, means securing said arms to the main shank, a segmental sleeve on the free end of each of said arms projecting through said nut and engaging opposite faces respectively of said auxiliary shank and a flange on each of said segmental sleeves engaging opposite ends respectively of said nut.

A wrench having, in combination, a main shank with a aw thereon, an auxiliary shank with a jaw thereon, a nut having screw-threaded engagement with said aux iliary jaw, a yoke comprising two independent arms, means securing said arms in reversely disposed positions to said main shank, the free ends of said arms engaging opposite ends of said nut.

6. A wrench having, in combination, a main shank with a jaw thereon, an auxiliary shank with a jaw thereon, a nut having screw-threaded engagement with said auxiliary shank, ayoke comprising two indc pendent arms approximately duplicates of each other and mean securing said. arms to the main shank in reversely disposed positions, the free ends of said arms engaging opposite ends of said nut. i

7. A wrench having, in combination, a main shank with a jaw thereon, an auxiliary shank with a jaw thereon, a nut having screw-threaded engagement with said auxiliary shank, a yoke comprising two independent arm approximately duplicates of each other and means securing said arms to the main shank in reversely disposed posi tions, the free ends of said'arms engaging opposite ends of said nut and opposite faces respectively of said auxiliary shank.

In testimony whereof I have hereunto set my hand in presence of two subscribing wit IIGSSES.

J OHN F. DELANEY.

Witnesses:

FRANKLIN E. Low, HAZEL F. LA MUDGE. 

